Well, the obvious counter to spinners is nets and loose fibers, or otherwise fouling the spinner's bearings, so it's like banning paper from a rock-paper-scisso

Well, the obvious counter to spinners is nets and loose fibers, or otherwise fouling the spinner's bearings, so it's like banning paper from a rock-paper-scissors tournament. Everybody's gonna throw rock, and the people who still throw scissors because rock is boring get creamed. Ablative spinner shields are too heavy, and get in your way as much as they get in the spinner's way.